Courtois, who is currently in his third season on loan at Atletico from Chelsea, has been linked with a move to Real Madrid at the end of the season.
However, Cerezo has refused to be drawn on the transfer talk and claims that he is used to such matters cropping up in the week leading up to the Madrid derby.
"We always have the same problem when we have a match against Real Madrid," he told reporters.
"All I can say, is that he has a contract with us until the end of the season."
Atletico welcome Real to the Calderon at the weekend.